Mine is: Getting married, complete and total waste of time.
In my teens, listening to what people told me about not being able to pursue my career choices
I'm in the same boat currently
I don't really have regrets , I saw my life as just learning - I am sure that I had them fleetingly after relationship break up s etc. at the time but they faded away -and were replaced by a new challenge' I married a right eejit but life was kind and he mostly stayed out of my life _ I think I had quite a big life (in my own terms as I was up for anything anyone proposed) - I'll be 70 shortly and still no regrets nothing left undone that I wanted to do - which is just as well really ,
It is not a waste of time if you learned something out of it. Granted the returns may not warrant the time dedicated but... Live and Learn.
< I regret not getting a bottle of scotch to go with this cigar.
Falling for the wrong woman. I fell madly in love with someone and thought she loved me as well. Turned out I was very wrong. Of course I did not find that out until after 6 years and a child.
How would I know? Next week I may have a different opinion. Even when I may had said... letting this woman go three months ago. And yesterday I may tell you... well, she is back in my life you know? I don't know next week what it will be... That job I declined, the woman I did not followed to the west coast, the ones left overseas? The one in the south? the one in the island? Those I ran away from? It is just decisions... No Regrets what so over. "Que Sera Sera, Whatever May Be, May Be". Just Live and Learn but No Regrets.... It is all a Good Ride to Enjoy.